You said you could do a tutorial on this
Can you show me how (I lost my VB5 Graphics programming book)
(yes, and dont laugh at me for losing a book)
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You said you could do a tutorial on this
Can you show me how (I lost my VB5 Graphics programming book)
(yes, and dont laugh at me for losing a book)
I never said that (at least not that I'm aware of, maybe I said it in an alcohol induced stupor) Sastraxi I've never used either one of those functions. I'll see if I can figure them out though.
Maybe this will help...
Code:Option Explicit
Private Const BI_RGB = 0&
Private Const DIB_RGB_COLORS = 0 ' color table in RGBs
Private Type BITMAPINFOHEADER '40 bytes
biSize As Long
biWidth As Long
biHeight As Long
biPlanes As Integer
biBitCount As Integer
biCompression As Long
biSizeImage As Long
biXPelsPerMeter As Long
biYPelsPerMeter As Long
biClrUsed As Long
biClrImportant As Long
End Type
Private Type RGBQUAD
rgbBlue As Byte
rgbGreen As Byte
rgbRed As Byte
rgbReserved As Byte
End Type
Private Type BITMAPINFO
bmiHeader As BITMAPINFOHEADER
bmiColors As RGBQUAD
End Type
Private Declare Function CreateCompatibleDC Lib "gdi32" (ByVal hdc As Long) As Long
Private Declare Function CreateDIBSection Lib "gdi32" (ByVal hdc As Long, pBitmapInfo As BITMAPINFO, ByVal un As Long, ByVal lplpVoid As Long, ByVal handle As Long, ByVal dw As Long) As Long
Private Declare Function GetDIBits Lib "gdi32" (ByVal aHDC As Long, ByVal hBitmap As Long, ByVal nStartScan As Long, ByVal nNumScans As Long, lpBits As Any, lpBI As BITMAPINFO, ByVal wUsage As Long) As Long
Private Declare Function SetDIBitsToDevice Lib "gdi32" (ByVal hdc As Long, ByVal x As Long, ByVal y As Long, ByVal dx As Long, ByVal dy As Long, ByVal SrcX As Long, ByVal SrcY As Long, ByVal Scan As Long, ByVal NumScans As Long, Bits As Any, BitsInfo As BITMAPINFO, ByVal wUsage As Long) As Long
Private Declare Function SelectObject Lib "gdi32" (ByVal hdc As Long, ByVal hObject As Long) As Long
Private Declare Function DeleteDC Lib "gdi32" (ByVal hdc As Long) As Long
Private Declare Function DeleteObject Lib "gdi32" (ByVal hObject As Long) As Long
Private Declare Function BitBlt Lib "gdi32" (ByVal hDestDC As Long, ByVal x As Long, ByVal y As Long, ByVal nWidth As Long, ByVal nHeight As Long, ByVal hSrcDC As Long, ByVal xSrc As Long, ByVal ySrc As Long, ByVal dwRop As Long) As Long
Private Declare Function GetDC Lib "user32" (ByVal hwnd As Long) As Long
Dim iBitmap As Long, iDC As Long
Private Sub Form_Paint()
'KPD-Team 2000
'URL: http://www.allapi.net/
'E-Mail: [email protected]
'-> Compile this code for better performance
Dim bi24BitInfo As BITMAPINFO, bBytes() As Byte, Cnt As Long
With bi24BitInfo.bmiHeader
.biBitCount = 24
.biCompression = BI_RGB
.biPlanes = 1
.biSize = Len(bi24BitInfo.bmiHeader)
.biWidth = 100
.biHeight = 100
End With
ReDim bBytes(1 To bi24BitInfo.bmiHeader.biWidth * bi24BitInfo.bmiHeader.biHeight * 3) As Byte
iDC = CreateCompatibleDC(0)
iBitmap = CreateDIBSection(iDC, bi24BitInfo, DIB_RGB_COLORS, ByVal 0&, ByVal 0&, ByVal 0&)
SelectObject iDC, iBitmap
BitBlt iDC, 0, 0, bi24BitInfo.bmiHeader.biWidth, bi24BitInfo.bmiHeader.biHeight, GetDC(0), 0, 0, vbSrcCopy
GetDIBits iDC, iBitmap, 0, bi24BitInfo.bmiHeader.biHeight, bBytes(1), bi24BitInfo, DIB_RGB_COLORS
For Cnt = LBound(bBytes) To UBound(bBytes)
If bBytes(Cnt) < 50 Then
bBytes(Cnt) = 0
Else
bBytes(Cnt) = bBytes(Cnt) - 50
End If
Next Cnt
SetDIBitsToDevice Me.hdc, 0, 0, bi24BitInfo.bmiHeader.biWidth, bi24BitInfo.bmiHeader.biHeight, 0, 0, 0, bi24BitInfo.bmiHeader.biHeight, bBytes(1), bi24BitInfo, DIB_RGB_COLORS
DeleteDC iDC
DeleteObject iBitmap
End Sub
You said that, and I thought it must mean using Get&Set bitmap bits because I had heard of it and I knew that that's what it did.Quote:
The SetPixelV would probably be the fastest way to draw directly to the picturebox. If this isn't fast enough you can draw directly to an offscreen DC and then just blt it directly from memory into the picture box (alot more code), let me know if you need an example for that....
-YoungBuck
Anyways, I think I have found a much more simple way, using only GetObject, SetBitmapBits, and GetBitmapBits!
Usage:Code:'mod1.bas
Public ColourCodes() as Long
Public HookIM as Long
Public WW
Public HH
Public Declare Function GetBitmapBits Lib "gdi32"
Alias "GetBitmapBits" (ByVal hBitmap As Long, ByVal dwCount As Long, lpBits As Any) As Long
Public Declare Function SetBitmapBits Lib "gdi32" Alias "SetBitmapBits" (ByVal hBitmap As Long, ByVal dwCount As Long, lpBits As Any) As Long
Public Declare Function GetObject Lib "gdi32" Alias "GetObjectA" (ByVal hObject As Long, ByVal nCount As Long, lpObject As Any) As Long
Public Type BITMAP '14 bytes
bmType As Long
bmWidth As Long
bmHeight As Long
bmWidthBytes As Long
bmPlanes As Integer
bmBitsPixel As Integer
bmBits As Long
End Type
Public iBit as BITMAP
Public NullBitmap as BITMAP
Function HookBitmap(bImage as Long)
hookIM = bImage
HookBitmap = GetObject(bImage,14,iBit)
End Function
Function DestroyHook()
Set iBit = NullBitmap
End Function
Function GetPixels
ww=iBit.bmWidth
hh=iBit.bmHeight
ReDim ColourCodes(1 to ww, 1 to hh) as Long
GetPixels = GetBitmapBits(hookIM,ww*hh,ColourCodes(1,1))
End Function
Function SetPixels
SetPixels = SetBitmapBits(hookIM,ww*hh,ColourCodes(1,1))
End Function
Code:
Picture1.AutoRedraw = True
HookBitmap Picture1.Image
GetPixels
For I = 1 to WW
For J = 1 to HH
Randomize
ColourCodes(I,J)=RGB(RND*255,RND*255,RND*255)
Next J
Next I
SetPixels
DestroyHook
Picture1.Refresh